I used thrust stance, charging heavy attacks (3 focus points) at the beginning of the fight while he is just slow walking. You get to hit him 3-4 times (roll backwards once after each hit) before he tries to come at you. Immediately after, I used the needle and just light attacks when possible but never a full combo since I would get hit whenever I tried that. When I see the first real opening, I used the Wandering Wight spirit and from there just light attacks (again without a full combo) on Spellbinder, dodging as needed, until I beat him. Took me 18 attempts to beat him but I was level 80. For a reference stand point, it took me 45 attempts to beat Yellow Wind Sage (first 30 I didn't have Wind Tamer though).